Cement

Cement

Our customer satisfaction is our top priority. We have put in place a system which guarantees the best service from order placement through the receipt of products.

Ciments Jbel Oust has a production capacity of 1.8 million tons of cement and lime, and a fast and modern shipping service which ensures the loading of high quality products in record time.

Each customer receives special treatment; accordingly the relationship is no longer simply one of provider-customer, but rather a partnership that ensures continuous communication and individualized and customized service that meets the specific needs of each client.

We produce seven types of cement for different uses in construction. We offer the market a variety of cements to meet the specific needs of our customers in terms of quality, consistency, durability and environmental performance.

Our cements are available in 50 kg bags loaded on pallets or directly on the truck or in bulk.

All of our products have been used in many major construction projects in Tunisia, and we continue to invest in research and development to provide our customers innovative solutions tailored to their needs.

Our company adopted a strategy of sustainable development as part of an Integrated Management System that encompasses Quality, Environment and Health and Safety. Our Management System Quality (QMS) has had ISO 9001 certification for several years. We have also obtained the OHSAS 18001 certificate of Management of Health and Safety at Work and the ISO 14001 Environmental Management certificate.

Production Process

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1

Pre homogenization

1

Everything begins with the mining of the limestone, the main raw material in cement. The material is extracted from the quarries, crushed and stored in the pre-homogenization piles. At this stage, the first samples are collected for analysis and the chemical composition of the limestone is determined, including the calcium, silicon, iron and aluminum contents.

2

Raw Mill

2

The limestone is mixed with clay and specific additives, such as iron ores, aluminum or co-processed substitute materials, ground, and then its reduced to a very fine powder known as raw meal. A filter installed in the mill prevents dust emissions to the atmosphere at this stage. The raw meal is then stocked in special homogenization silos until it is fed to the rotary kiln.

3

Clinker production

3

Before entering the rotary kiln, the meal goes through a pre-calciner tower with cyclones where it is heated by hot gases from a kiln that can reach up to 1,450°C. This ensures the raw meal enters the kiln at an approximate temperature of 900°C. The material created at this stage is called clinker, an intermediate product which constitutes the basis for cement.

4

Cooling

4

To finalize the clinker production process, the material coming out of the kiln is sent to a cooler where its temperature is reduced to under 100°C. A filter installed at the outlet of the equipment liberates the air from the cooling process to the atmosphere free of pollutants. At this stage, further samples are collected and the clinker is transported to silos and hoppers where it is stored with the other additive materials that go into the cement: gypsum, limestone, pozzolan or slag. The percentage of each one of these additives will determine the type of cement.

5

5

Cement grinding

In this stage the mixture of clinker and additives goes to the cement mill where all the components are ground until they achieve the ideal fineness, resulting in top quality cement.

6

6

Dispatch

After cement grinding, the cement is stored in silos, where it remains until it is bagged or commercialized in bulk, dispatched by truck, rail or barges.